Thing is, the Air Force is replacing the vast majority (or at least attempting to do so) of its air fleet. We're attempting to replace old airframes, some of which are 50 year old designs, with new shiny top-of-the-line aircraft of the same role...only to have this happen.
Basically, we're replacing KC-135s which are surviving off of other cannibalized tankers and F15s which are having cockpits fall off in midflight with...fighters that can't stay in the air for a respectable amount of time due to rain.
Basically, replacing old, outdated skeletons of aircraft with high maintenance problems and replacing them with new, shinier...aircraft with high maintenance problems.
The Air Force has spent the last several years (and by that I mean decades) ruled by CSAFs and senior leadership insistent on upgrading fighter aircraft above anything--the common term was Fighter Mafia. But ever since Gates took over as SecDef he's been attempting to put that to a stop, essentially firing the old Airforce Chief of Staff and AF Secretary. The new leadership is honestly a little bit more focused on the more significant problems: nukes, UAVs, and reversing the airmen-for-fighters drawdown on the last several years.
We'll just have to wait and see with this though...